The National Petroleum Reserve-Alaska (NPRA) Legacy Data Archive contains geological and geophysical data collected during two extensive exploration programs, operated first by the U.S. Navy (1944-1953) and later by the U.S. Geological Survey (USGS) (1974-1982). This dataset includes records from 36 test wells, 45 core tests, and over 12,000 line miles of seismic data, along with a wide array of analyses and documents generated during the exploration of the NPRA. The archive serves as a vital resource for understanding the geophysical characteristics of the NPRA region and supports ongoing and future research. Future updates will replace low-resolution images with higher-quality versions, provide Section 508-compliant documents, cross reference data with the USGS Core Research Center and further documentation in this metadata.